Synchronised IRIG time code generator is range equipment generating range timing signals. It can generate IRIG A and IRIG B codes in DC coded or modulated modes. The modulated signals are Digitally Synthesized for very high accuracy in timing. |
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| The generator can be synchronized with a variety of external sources. The external sources could be a 1PPS signal generated by GPS receiver or output of a highly stable sine oscillator of 1,5 or 10MHz. The reader can read time signals in both IRIG A and IRIG B formats. It accepts both modulated and DC coded signals. It can accept modified codes as defined by DRDO. While accepting modulated signals, the reader gives out amplitude normalised output derived from the input. Various outputs are available as shown below from the reader and the generator. |
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| Specifications |
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Time Code Reader:
Inputs:
- Format
Selectable from IRIG A and IRIGB
- Encoding
DC or Modulated
- Signal Level
- 0.1V to 10Vp-p, single-ended for modulated
- RS422 for DC coding
- Impedance
Better than 50K for modulated signal
- Filters
- Low pass filter to reject high frequency noise
- High pass filter to reject 50Hz line frequency
- Modulation Ratio 3:1 to 6:1
Time Code Generator
Time Base:
- Internal
- 10Mhz,TCVCXO +/- 5ppm,
Control voltage - 0 to 5V
OR
- 10Mhz, Oven Controlled Crystal Oscillator with stability better than 1*10-9
- External
- Sine Wave 1 MHz, 5 MHz, 10 MHz user selectable
- 1PPS
- GPS
- Built-in GPS receiver (Optional)
- IRIG B DC
Synchronization accuracy:
- Within 1 micro sec of input IRIG
Output:
- IRIG B (AC modulated)
- Modulated output at 3:1 ratio
- No. of outputs - One
- Multiple outputs Optional
- Level 5V p-p
- Impedance 50 ohms
- IRIG B (DC) RS422 two outputs
- BCD outputs as in reader
- Pulse Outputs
- 1PPS, 10PPS, 100PPS, 1kPPS
- 50% duty cycle
- HCMOS compatible outputs
- Other Outputs
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Outputs:
- BCD
- Pulse Rates
- 1PPS, 10PPS, 100PPS, 1KPPS Generated from Carrier
- Duty Cycle - 50%
- Level - HCMOS compatible
- AGC'd output
- Digitally controlled AGC circuit output 2V p-p into 50W
- LOS Detection
- Threshold adjustable from 1V to 10V (pk-pk)
- LOS Indication - HCMOS compatible
- Code Error HCMOS compatible
- Time Display
- 9 digit high bright 0.5" LED 7-segment display for days, hours, minutes and seconds
Front Panel:
LED Indicators:
- LOS
- Code Error
- Remote (Reader)
- DOWN
- HOLD
- Ext 1PPS
Controls:
- Power ON/OFF
- 3 keys to program and
- 3 keys for RUN/HOLD
General:
- Power
- 230V AC +/- 10%, 50Hz
- Less than 25W
- 28V DC
- Operating Temp
- 0°C to 50°C (commercial version)
- Storage Temp
- -20°C - 55°C (commercial version)
- Humidity up to 95% non-condensing
- Enclosure 19" rack mountable/stand-alone
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